Gas venting device for molding operations

Details Gas venting device for molding operations Gas venting device for molding operations

1987-06-05

1988-11-29

Lin, Kuang Y.

Metal founding

Means to shape metallic material

Pressure shaping means

164410, 425420, 425812, B22D 1720

Patent

active

047874368

ABSTRACT:
A gas venting device for molding operations is disclosed having a valve for closing off a gas evacuation system from a mold when the mold cavity is filled with melt. A positive drive mechanism is provided for closing the valve, and a mechanism is provided for allowing the valve body to close more rapidly by action of the melt itself against the valve body in the event the melt advances more rapidly through the gas vent passages than expected.

REFERENCES:
patent: 4538666 (1985-09-01), Takeshima et al.
patent: 4691755 (1987-09-01), Kuriyama et al.

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